Figure 1: Schematic diagram illustrating the process
of an NS-based WEG. The flow diagram illustrates the preparations,
porous hierarchical structure, water-surface interactions, water
transportation through channels and generating streaming potential. The
center left demonstrates voltage/current generation through evaporation
in graphite-NS-graphite sandwich structure. A photograph shows two
WS-H+-WEG devices connected in series; two units in
series and parallel can power LCD calculator.